Grinding-gage.



A. L. WADDELL.

GRINDING GAGE.

APPLICATION men SEPT. 11, 1914.

1,149,31 1. Patented Aug. 10, 1915.

TED @TATE PATENT @FFECE.

ARTHUR L. WADDELL OF CHICAGO, ILLINOIS.

GRINDING-GAGE.

To all whom it may concern I Be it known that I, ARTHUR'L. WAD ELL, a citizen of the United States, residing at Chicago, in the county of Cook and, State of Illinois, have invented certain new and useful Improvements in Grinding-Gages, of which the following is a specification.

My invention relates generally to devices for gaging the sharpening of tools having beveled edges, but particularly to devices for gaging the edging of scissors, chisels plane-bits, etc, and has for its object the production of an article of manufacture that will be, at once, simple, light,-cheap and easy of construction, and that will hold such a tool in such a position on a planesurfaced whet-stone or other suitable abrading medium as to enable the operator to give it a uniform edge at a given and uniform angle. I attain this object by a device which consists of the combination of a holder for gripping the tool to be sharpened, a binding-screw or nut for securing the tool in said holder, a gage-bar having one end attached to said holder and the other so constructed as to slide easily on a table or other smooth plane surface on which the whetstone or other suitable abrading medium may be resting, and at the same time hold the rest of the device free of said surface and medium and an adjustment-joint at some point along said gage-bar, or at the point or points of its attachment to said holder, for the purpose of adjusting the device to the bevel of the edge to be sharpened.

Referring to the drawing, Figure 1. represents a side elevation showing the device in approximately full size, and showing cross-sectionally the blade of a pair of scissors or shears in place in the holder and resting on a whet-stone, the latter and the extreme end of the, gage-bar resting on a table or other smooth, plane, horizontal surface. Fig. 2. represents a front elevation of the same except that the pair of scissors is shown in full, or nearly so. Fig. 3. repre sents the side elevation of a modification of the device, reduced to about one half its actual size, and holding a plane-bit in position on a whet-stone and ready to be agitated under pressureby the hand; While Fig. 4. is a viewof the modification from beneath.

lhe same reference characters refer to the Specification of Letters Patent.

' Patented Aug. 10, 1915.

' Application'filed September 17,1914. Serial No. 862,155.

Same or similar parts throughout the various views respectively.

The device is made of steel or other suitableimetal or material, and consists of the holder A, the gage-bar B, the binding or setscrew 0, and the adjustment-joint D. vThe attached end of the gage-bar B, is provided with threads, and the binding-nut C, is,

screwed down into position thereon. This threaded end is then passedthrough a hole in about the middle of the posterior mandible of the holder A, said hole being large enough to permit of its free sliding therein, and its tip is inserted into asmaller hole in a corresponding position in the anterior or near the middle the gage-bar B, is pro-' vided with a hinge joint D, for the purpose of adjustment to the angle of the bevel of the tool to be sharpened, said joint being stiffened by a short bolt and wing-nut.

It will be observed that, when a blade of a pair of scissors or shears is firmly gripped in the holder, as shown in Figs. 1. and 2., and the gage-bar is properly adjusted to the bevel of the blade, an operator can, bv placing the blade on a suitable whet-stone or other abrading medium lying at the edge of a table, or other smooth plane surface,

and the free end of the gage-bar on the table or surface itself, actuate the whole under pressure of the hand with the effect of giving to the blade a uniform edge at a uniform angle.

In themodified form, shown in Figs. 3.

and 4., the holder E is in the form of an give stability to this modification, the gage-j bar F, is so bent that its'two limbs flare, and that it will rest on the table, or other plane surface in connection with which it is used, only at the angles, theentire contrivance resting on the whet-stone and table or other surface much after the manner of a tripod.

It is of course understood that other modifications, such as the omission of the adjustment-joint from the preferred form, or placing the binding nut at the extreme near end of the gage-bar and in front of the anterior mandible instead of back of'the posterior mandible as shown in'the preferred form, or using a pair of holders such as shown in the preferred form, turned on the side with mandibles facing each other, for holding chisels, plane-bits,'etc. might be resorted to, but without departing from the principle, scope and spiritof'my invention, or resulting in anything but substantial equivalents, and such modifications are herein expressly included,

'Having described my invention, I claim: 1, In a grinding-gage, a one-piece adjustable blade-holder, a binding-screw 00- operating with and controlling same, and

an adjustable gage-bar attached thereto,

' and bent to slide easily on a smooth plane surface supporting a suitable abrading medium, and hold the rest of the device Copies of this patent may be obtained for free of said surface and medium when, with blade in place, the same is actuated thereon under pressure by the hand.

2. In a grinding-gage, the combination of a one-piece recurved blade-holder with a gage-bar bearing threads and carrying a binding-nut at its attached end, and having its free end bent to slide easily on a smooth plane surface supporting a suitable abrading medium, and hold the rest of the device free of said surface and medium when, with blade in place, the same is actuated thereon under pressure by the hand. 7

3. In a grinding-gage, the combination of a onepiece adjustable blade-holding member bent to form a pair of mandibles for securing the blade to be sharpened, with a gage-bar bearing threads and carrying a binding-nut operating thereon at one end,

and attached thereat'to one of said Inandi-'v bles, while passing loosely through the other, and having its free end bent to slide easily on a smooth plane surface support ing a suitable abrading medium, and hold the rest of the device free of said surface and medium when, with blade in place, the; same is actuated thereon under pressure of the hand,

ARTHUR L.

' Witnesses: C. E. Srmns, ADA WEST AIKEN.

WADDELL.

five cents each, by addressing the Commissioner of Patents. Washington, D. C. l 

